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We address the problem of porting parallel distributed applications from static homogeneous cluster environments to dynamic heterogeneous Grid resources.
The platform characteristics include the compute nodes themselves (CPU and memory) and the interconnection network for which a controlled overlay network above the homogeneous cluster is built.
At present, our implementation is limited to single-axis tomography acquisition schemes that are close to the parallel-beam or circular cone-beam geometry, and assumes a homogeneous cluster with similar GPUs and nodes.
Since this problem is strongly NP-hard, we design a fully polynomial-time approximation scheme (FPTAS) for a special case with a pipeline-structured workflow on a homogeneous cluster and a heuristic for the generalized problem with an arbitrary workflow on a heterogeneous cluster.
For that purpose, we develop an exhaustive quantitative and comparative analysis of several available and new parallel hyperspectral imaging algorithms by comparing their efficiency on both a fully heterogeneous network of workstations and a massively parallel homogeneous cluster at NASA's Goddard Space Flight Center in Maryland.
For example, a distribution range was observed to change from ~20 nm to more than 200 nm as Ni thicknesses changes from ~4 to ~22 nm, which implies that small Ni thicknesses are also to be preferred, if more homogeneous cluster size distribution is needed during the synthesis of carbon nanotubes.
Similar(27)
Using that data, they broke each Zip Code and its neighborhoods into distinct, homogeneous clusters.
In homogeneous clusters, all nodes have similar properties.
To identify the health-risk behaviour of various homogeneous clusters of individuals.
In multi-spectral imagery, burned areas build homogeneous clusters of low internal heterogeneity.
A simulation model, consisting of two homogeneous clusters, is considered to evaluate the performance for various workloads.
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